.div1{
    width:0px; 
    height:0px;
    background-color: red;
    margin:10px 20px 30px 40px;
    border-top:20px solid yellow;
    border-right:20px solid black;
    border-bottom:20px solid pink;
    border-left:20px solid transparent;
}
.div2{
    width: 10px; 
    height:10px;
    background-color: rgb(10,10,10);
    opacity: .9;
    border-radius: 50%;
}
.div3{
    width: 10px; 
    height:10px;
    background-color: #f00;
    opacity: .80;
    border-top:30px solid transparent;
    border-right:30px solid transparent;
    border-bottom:30px solid pink;
    border-left:30px solid transparent;
}